# PESD0603B12

**YFW** · ESD And Surge Protection (TVS/ESD) · 0603

PESD0603B12 from YFW, in a 0603. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 1 | passive | Bidirectional ESD protection terminal connected to the signal line to be protected; continuous operating voltage 12.0 V max, leakage current 100 nA max, capacitance 0.05 pF typ. |
| 2 | 2 | passive | Bidirectional ESD protection terminal connected to ground or the return path (the application circuit ties one side to GND); the device is symmetric with 12.0 V max operating voltage. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| Package | 0603 |
| Category | Circuit Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `PESD0603B12`
- Footprint: `Diode_SMD:D_0603_1608Metric`
- 3D model: 0603 (KiCad packages3D, STEP)
- 3D model files: `pesd0603b12-etched.step` / `pesd0603b12-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pesd0603b12.step` / `pesd0603b12.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [YFW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603382934733152256) (4 pp, sha256 `e58b4ba512270fc9`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (vision), consensus `claude-opus-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/pesd0603b12-datasheet.pdf)